VISUAL MICRO LAB PROFESSIONAL
Our Sets are used by injectable pharmaceutical manufacturers and professional organizations world-wide to train and qualify human inspectors and semi- and fully automated inspection machines. Grain flow lines are the resulting fiber pattern observed in a hot or cold worked material, showing the manner in which the metal flowed during the forming process. Visual Standards Micro Measurement Labs has been manufacturing Challenge Sets for Visual Inspection for nearly 20 years.
Macroetch test to ASTM E340 is the controlled surface etching of a metal or alloy sample to reveal a structure such as grain flow lines and ingot patterns that are visible at the low magnification. The sample is viewed with the unaided eye or at low magnification, usually no greater than 10 times. The macro examination is performed on the cross section, longitudinal section or through the thickness (‘Z’ direction) of the test sample. The samples can be ingots, castings, plates, bars, sheets or finished products. Etching is a chemical reaction on the surface of the test sample that allows viewing of the flow properties of the material. Often etching is required after the sample has been cut, ground and polished. The Test Processīefore macroscopic examination begins, the test sample must be prepared to specification. The macrostructural properties of a weldament can be important in weld procedure qualification or welder qualification.Ĭontact us to discuss your material and requirements. A weld cross section examination will reveal internal discontinuities, weld profile, extent of penetration and more. Macro examination of specimens exposed to passivation, salt spray, case depth and other testing, as well as macroscopic examination of welds are frequently performed. During macroscopic examination, findings can be documented with digital imaging to provide customers with a visual image in the Certified Test Report or a digital file that can be emailed. For updates, follow us on Twitter ScienceProfSPO. New resources are regularly added to the Virtual Microbiology Classroom.
The macro sample is prepared at LTI and generally entails cutting, grinding, polishing and etching. The laboratory PowerPoints contain many helpful photos of materials viewed in lab. The metallurgical engineering team at Laboratory Testing Inc., near Philadelphia, PA (USA), offers the following macroscopic examination services: LTI Capabilities pre-operational visual and tactile inspection of production equipment and environment for sanitary. Macroscopic Examination, also called Macro Test or Macro Examination, evaluates the quality and consistency of a test sample using only low or no magnification. Macro examination of metals can be used to assess quality through the evaluation of a sample’s macrostructural features, which may include grain flow, porosity and cracks. Macroscopic Examination Macroetch, Grain Flow, Surface Condition & More
0 kommentar(er)
